doubt about rooting methods for different versions of the phone

So as you guys know that asus has come out with many variants of zenfone 2 and i am planning to buy one so i just wanted to know that the rooting method is the same for them i.e for ze551ml with 1.8 GHz Intel Atom Z3560 Quad Core Processor or the ze550ml? Somebody please revert asap as i need to buy a phone urgently! going on for about 10 days now without a phone
Thank you in advance
And sorry if there is a thread on this before but i cant find